Aluminum gear 0.5 Module 80 or 85 Tooth

The product is light and hard, and can be used for a long time. Mainly used in RC Model making.
Tooth number: 80 teeth, 85 teeth
Module: 0.5
Thickness: 4.5mm
Outer diameter: 80 tooth outer diameter 42.5mm, 85 tooth outer diameter 45.5mm
Center large aperture: about 9.5mm
Center large aperture edge hole]: 3.1mm
Outer Medium Size Aperture: 6mm
Material]: Aluminum alloy